Efficient phase change heat storage device

Abstract

The utility model discloses an efficient phase change heat storage device which comprises a packaging unit, an inner container unit, a heating medium unit and a heat storage material unit. The packaging unit comprises a shell and a heat preservation layer. The inner container unit comprises an inner container, an inner container anti-corrosion layer, an inner container sealing plate, reinforcing ribs and a support. The heating medium unit is provided with a water inlet and outlet chamber cover, a contact water chamber cover, a tube plate, a tube plate anti-corrosion layer, a U-shaped heat exchange tube, a tube clamp and a connecting piece; the heat storage material unit comprises a filling pipe, an exhaust pipe and a phase change heat storage material. The U-shaped heat exchange tubes are fixed through tube clamps in a fixed-distance mode, and the inner container is matched with the heat exchange tubes in structure. The heat exchange tubes made of fluoroplastic and the anti-corrosion layers are adopted, the corrosion problem is solved, meanwhile, heat exchange dead zones are avoided by evenly arranging the heat exchange tubes, and the heat storage and release efficiency is improved. The branch design of the filling pipe and the exhaust pipe and the arrangement of the isolating valve ensure the material filling safety, and the water distribution hole structure ensures the uniform flow. The installation and maintenance are simplified through the flange connection and skid-mounted design of the inner container, and the device is suitable for various application scenes.

Description

Technical Field

[0001] This utility model relates to the field of thermal storage device technology, specifically to a high-efficiency phase change thermal storage device. Background Technology

[0002] Phase change thermal energy storage (PCE), as a heat storage technology, is mainly used in scenarios where there are temporal and spatial misalignments between supply and demand, and temporal and spatial differences in energy prices. It is currently widely applied across various industries. PCE primarily utilizes the phase change of phase change materials to induce significant changes in internal energy, thereby achieving the effects of heat storage and release. For example, in oilfield production plants, the operating load of heating furnaces fluctuates significantly depending on the stage of oil production. To stabilize the furnace operating load and improve system thermal efficiency and equipment lifespan, PCE devices can be added to store heat during periods of low heat demand and release it during periods of high heat demand, thus achieving safe and efficient equipment operation. Furthermore, in some electric heating applications, PCE devices are used to store cheap off-peak electricity at night as heat energy, releasing the stored heat during the day when electricity prices are higher, thereby reducing heating costs.

[0003] Phase change thermal energy storage devices mainly consist of two parts: phase change thermal energy storage material and heat exchanger. These two parts work together to determine the overall performance of the entire storage device. Currently, there are various types of phase change thermal energy storage materials on the market, typically categorized into high, medium, and low-temperature types based on the storage temperature. Heat exchangers, as mature products, are diverse and widely used; however, heat exchangers used in thermal energy storage devices still face some common problems. Due to the structure of the heat exchange tubes and the inner liner, it is often difficult to achieve uniform arrangement of the heat exchange tubes within the phase change material. Furthermore, the physicochemical properties of phase change thermal energy storage materials often lead to corrosion damage to the heat exchange tubes. Therefore, it is necessary to propose a high-efficiency phase change thermal energy storage device to solve these problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-efficiency phase change thermal storage device, thereby solving the problem that it is difficult to achieve uniform arrangement of heat exchange tubes in phase change materials and that phase change thermal storage materials can cause corrosion damage to heat exchange tubes.

[0005] This utility model discloses a high-efficiency phase change thermal storage device, which includes an encapsulation unit, an inner liner unit, a heat medium unit, and a thermal storage material unit. The encapsulation unit includes an outer shell and an insulation layer wrapped inside the outer shell; the inner liner unit includes an inner liner, an inner liner anti-corrosion layer disposed inside the inner liner, an inner liner sealing plate fixed to one side of the inner liner, an inner liner reinforcing rib disposed on the outer wall of the inner liner, an inner liner connecting flange connecting the inner liner and the inner liner sealing plate, and a support for supporting the inner liner; the heat medium unit includes an inlet and outlet water chamber cover, a connecting water chamber cover, an inlet pipe and an outlet pipe connected to the inlet and outlet water chamber cover, a tube sheet connected to the inlet and outlet water chamber cover, the connecting water chamber cover and the inner liner via a flange, a tube sheet anti-corrosion layer attached to the underside of the tube sheet, a U-shaped heat exchange tube penetrating the tube sheet and the tube sheet anti-corrosion layer, a pipe clamp fixing the U-shaped heat exchange tube, and a pipe clamp connector connecting the pipe clamp; the heat storage material unit includes a filling pipe, an exhaust pipe, and a phase change heat storage material filled in the space enclosed by the inner liner anti-corrosion layer and the tube sheet anti-corrosion layer. The two ends of the U-shaped heat exchange tube are respectively inserted into the tube sheet and the tube sheet anti-corrosion layer, and are fixed to the tube sheet by expansion or welding; the lower straight section of the U-shaped heat exchange tube is arranged at regular intervals by multiple tube clamps and connected and fixed by tube clamp connectors; the inner liner anti-corrosion layer and the tube sheet anti-corrosion layer are both fluoroplastic liners, and the U-shaped structure of the inner liner matches the shape of the U-shaped heat exchange tube.

[0006] Furthermore, the filling pipe and the venting pipe respectively penetrate the tube sheet and the tube sheet anti-corrosion layer, and are divided into two branches extending to both ends of the top of the inner liner. Two filling holes and two venting holes are opened on the middle upper wall plate of the inner liner and the inner liner anti-corrosion layer, respectively. The two branches of the filling pipe are connected to the two filling holes, and the two branches of the venting pipe are connected to the two venting holes. Each of the filling pipe and the venting pipe is equipped with an isolation valve. The inner wall of both the filling pipe and the venting pipe is lined with a fluoroplastic anti-corrosion layer.

[0007] Furthermore, the inner side of the inlet and outlet water chamber cover is provided with a water chamber partition, which divides the water chamber into an inlet water chamber and an outlet water chamber; the inner walls of the inlet pipe and the outlet pipe are lined with a fluoroplastic anti-corrosion layer, and the lower outer wall and end face of the inlet pipe and the outlet pipe are provided with a number of water distribution holes.

[0008] Furthermore, the U-shaped heat exchange tube is a small-diameter, thin-walled fluoroplastic tube; the tube clamp is made of fluoroplastic material, and adjacent tube clamps are fixedly connected through tube clamp connectors.

[0009] Furthermore, the inner liner sealing plate is fixedly connected to the inner liner and the tube sheet via an inner liner connecting flange; the inner wall of the inner liner sealing plate is lined with a fluoroplastic anti-corrosion layer.

[0010] Furthermore, the upper part of the inlet / outlet water chamber cover and the connecting water chamber cover are respectively provided with lifting lugs; the outer shell is made of color steel plate or galvanized iron sheet and is wrapped around the outside of the insulation layer.

[0011] Furthermore, the tube sheet is connected to the inlet and outlet water chamber covers, the connecting water chamber cover, and the inner tank via a water chamber cover connecting flange; the bottom of the inner tank is supported and fixed by a support.

[0012] Furthermore, a material temperature gauge is installed in the phase change thermal storage material near the water outlet pipe to monitor the temperature of the thermal storage material.

[0013] The beneficial effects of this invention are as follows: By homogenizing the distribution of heat exchange tubes and phase change thermal storage materials, this invention avoids the heat exchange dead zone problem commonly found in traditional thermal storage devices, fully utilizing the value of each unit of phase change thermal storage material, making the heat storage and release processes more thorough; by using small-diameter, thin-walled fluoroplastic tubes as heat exchange tubes and configuring dedicated fluoroplastic tube clamp assemblies, it completely solves the corrosion problem of some phase change thermal storage materials on the tube bundle, while eliminating the complex support structure required for steel heat exchange tubes, significantly reducing the weight of the thermal storage device; the main body material of this thermal storage device adopts a combination of fluoroplastic and carbon steel, optimizing the overall equipment cost; the use of small-diameter, thin-walled fluoroplastic heat exchange tubes minimizes the impact of the low thermal conductivity of fluoroplastic material on the overall heat exchange intensity, effectively ensuring the system's heat storage and release power. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of the high-efficiency phase change thermal storage device of this utility model;

[0016] Figure 2 This is a right view of the high-efficiency phase change thermal storage device of this utility model;

[0017] Figure 3 This is a left view of the high-efficiency phase change thermal storage device of this utility model;

[0018] Figure 4 This is a top view of the high-efficiency phase change thermal storage device of this utility model;

[0019] Figure 5 yes Figure 1 AA section view;

[0020] Figure 6 yes Figure 2 BB section view;

[0021] Figure 7 yes Figure 2CC section view;

[0022] Figure 8 yes Figure 2 DD cross-sectional view;

[0023] Figure 9 yes Figure 3 EE section view;

[0024] Figure 10 yes Figure 3 FF section view;

[0025] Figure 11 yes Figure 9 A magnified view of a portion of region a;

[0026] Figure 12 yes Figure 8 A magnified view of region b;

[0027] Figure 13 yes Figure 7 A magnified view of region c;

[0028] Figure 14 yes Figure 10 A magnified view of a portion of region d;

[0029] Figure 15 This is a three-dimensional structural diagram of the high-efficiency phase change thermal storage device of this utility model. Figure 1 ;

[0030] Figure 16 This is a three-dimensional structural diagram of the high-efficiency phase change thermal storage device of this utility model. Figure 2 .

[0031] Illustration: 1-Inlet / outlet water chamber cover; 2-Connecting water chamber cover; 3-Outer shell; 4-Support; 5-Lifting lug; 6-Inlet pipe; 7-Outlet pipe; 8-Filling pipe; 9-Exhaust pipe; 10-Water chamber cover connecting flange; 11-Inner liner sealing plate; 12-Tube sheet; 13-Tube sheet anti-corrosion layer; 14-Inner liner anti-corrosion layer; 15-Inner liner; 16-Pipe clamp; 17-Heat exchange tube; 18-Water chamber partition; 19-Pipe clamp connector; 20-Inner liner reinforcing rib; 21-Inner liner connecting flange. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be pointed out that the following detailed description is illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0033] Please see Figures 1 to 16 This utility model provides a high-efficiency phase change thermal storage device, mainly including an encapsulation unit, an inner tank unit, a heat transfer medium unit, and a thermal storage material unit. The encapsulation unit mainly includes an outer shell 3 and insulation material. The inner tank unit mainly includes an inner tank 15, an inner tank sealing plate 11, an inner tank anti-corrosion layer 14, a support 4, inner tank reinforcing ribs 20, and an inner tank connecting flange 21. The heat transfer medium unit mainly includes inlet and outlet water chamber covers 1, connecting water chamber covers 2, an inlet pipe 6, an outlet pipe 7, lifting lugs 5, a water chamber cover connecting flange 10, a tube sheet 12, a tube sheet anti-corrosion layer 13, pipe clamps 16, heat exchange tubes 17, a water chamber partition 18, and pipe clamp connectors 19. The thermal storage material unit mainly includes a filling pipe 8, an exhaust pipe 9, and phase change thermal storage material.

[0034] The inner side of the inlet / outlet water chamber cover 1 is provided with a water chamber partition 18, which divides the water chamber into an inlet chamber and an outlet chamber. The inlet chamber is provided with an inlet pipe 6 at the top, and the outlet chamber is provided with an outlet pipe 7 at the top. The inlet / outlet water chamber cover 1 and the connecting water chamber cover 2 are connected to the tube sheet 12 and the inner tank 15 through the water chamber cover connecting flange 10. The tube sheet 12 is lined with a tube sheet anti-corrosion layer 13. Several tube holes are opened on the tube sheet 12 and the tube sheet anti-corrosion layer 13. The heat exchange tube 17 is a U-shaped tube. The top straight section of one side of the U-shaped heat exchange tube 17 passes through the tube sheet anti-corrosion layer 1 corresponding to the inlet / outlet water chamber cover 1. The tubes of the tube sheet 12 and the anti-corrosion layer 13 are fixed in the tube holes of the tube sheet 12 by expansion or welding. The top straight section of the other side of the U-shaped heat exchange tube 17 passes through the tube holes of the tube sheet anti-corrosion layer 13 and the tube sheet 12 corresponding to the connecting water chamber cover 2, and is also fixed in the tube holes of the tube sheet 12 by expansion or welding. The lower part of the U-shaped heat exchange tube 17 is inserted into the space enclosed by the inner anti-corrosion layer 14. The lower straight section of the U-shaped heat exchange tube 17 is arranged at regular intervals by multiple tube clamps 16, and the tube clamps 16 are connected by tube clamp connectors 1. 9. Connect and fix the heat exchange tubes 17 to ensure that they are relatively uniformly arranged and unaffected by the phase change heat storage material filling process. The phase change heat storage material is arranged outside the heat exchange tubes 17, within the area enclosed by the inner liner anti-corrosion layer 14 and the tube sheet anti-corrosion layer 13. The inner liner 15 is tightly attached to the outside of the inner liner anti-corrosion layer 14. The inner liner 15 is made of carbon steel and bears the weight of the phase change heat storage material. The shape and structure of the inner liner anti-corrosion layer 14 and the inner liner 15 are completely matched to the external structure design of the U-shaped heat exchange tubes 17 to ensure that each heat exchange tube 17 is surrounded by... The amount of heat storage material in the space is consistent. An inner liner sealing plate 11 is provided on one side of the inner liner 15. The inner liner sealing plate 11, inner liner 15, tube sheet 12, and tube sheet anti-corrosion layer 13 are fixedly connected by inner liner connecting flange 21. The outer edge of the wall panel of the inner liner 15 is provided with inner liner reinforcing ribs 20 to ensure the load-bearing strength of the inner liner. An insulation layer is laid on the outside of the inner liner 15. The thickness of the insulation layer is set according to the specific situation. An outer shell 3 is tightly attached to the outside of the insulation layer. The outer shell 3 is made of color steel plate or galvanized iron sheet material with anti-corrosion treatment to fasten the insulation layer.Meanwhile, the tube sheet 12 and the tube sheet anti-corrosion layer 13 are provided with filling pipe holes 8 and vent pipe holes 9 between the two water chamber covers. Two filling pipe holes 8 are provided on the front side and two vent pipe holes 9 are provided on the rear side of the inner wall plate of the inner liner 15 and the inner liner anti-corrosion layer 14 near the tube sheet anti-corrosion layer 13. The filling pipe 8, after passing through the holes on the tube sheet 12 and the tube sheet anti-corrosion layer 13, splits into two branches, one in front and one behind, which connect to the filling pipe 8 on the top side of the inner liner 15 and the other in the inner liner anti-corrosion layer 14, respectively. The pipe connection allows the filling pipe 8 to communicate with the phase change thermal storage material space of the device. The exhaust pipe 9, after passing through the pipe holes on the tube sheet 12 and the tube sheet anti-corrosion layer 13, splits into two branches, front and rear, which connect to the pipe holes on the other side of the top of the inner liner 15 and the inner liner anti-corrosion layer 14, respectively, thus communicating with the phase change thermal storage material space of the device. The upper part of the inlet / outlet water chamber cover 1 and the connecting water chamber cover 2 are each equipped with a lifting lug for hoisting the device. A support 4 is located directly below the inner liner 15 to support the entire device.

[0035] Preferably, the heat exchange tube 17 is a small-diameter, thin-walled fluoroplastic tube, which on the one hand increases the heat exchange area between the heat storage material and the heat exchange tube 17 per unit volume, and on the other hand completely solves the corrosion problem of the heat storage material on the heat exchange tube, while achieving the purpose of uniform distribution between the heat exchange tube 17 and the phase change heat storage material.

[0036] Preferably, the tube sheet anti-corrosion layer 13 and the inner liner anti-corrosion layer 14 are made of fluoroplastic material, thereby avoiding the corrosion problem of the heat storage material and extending the service life of the device.

[0037] Preferably, a material temperature gauge is installed in the phase change thermal storage material near the water outlet pipe 7 to monitor the temperature of the terminal thermal storage material in real time, which facilitates the optimized control of the heat storage and release process.

[0038] Preferably, each of the filling pipe 8 and the venting pipe 9 is provided with an isolation valve to facilitate the filling operation of the thermal storage material.

[0039] Preferably, two filling pipe holes and two venting pipe holes are opened at the top of the inner liner 15 and the inner liner anti-corrosion layer 14 near the middle position, which avoids the influence of residual air in the internal space on the filling process and can effectively ensure the smooth progress of the filling process of thermal storage material.

[0040] Preferably, the inner walls of the inlet pipe 6 and the outlet pipe 7 are lined with a fluoroplastic anti-corrosion layer, and the lower outer wall and end face of the inlet pipe 6 and the outlet pipe 7 are provided with a number of water distribution holes to equalize the water flow distribution and ensure that the water flow in each heat exchange tube 17 is consistent.

[0041] The heat storage and heat release processes of the high-efficiency phase change thermal energy storage device of this invention are as follows:

[0042] Heat storage process: High-temperature hot water from the heat source side enters the inlet chamber of the inlet and outlet chamber cover 1 through the inlet pipe 6, and enters the heat exchange tube 17 through the tube hole on the tube sheet 12. The hot water passes through the heat exchange tube 17, the connecting water chamber cover 2, the heat exchange tube 17 and the outlet chamber of the inlet and outlet chamber cover 1 in sequence, and finally is discharged to the heat source side through the outlet pipe 7. During the heat storage process, the high-temperature hot water and the solid phase change heat storage material complete the heat exchange process through the tube wall of the heat exchange tube 17. After the high-temperature hot water releases heat and cools down, it returns to the heat source side to absorb heat. After absorbing heat, the phase change heat storage material changes from solid to liquid. When the temperature of the end heat storage material reaches the set upper limit of the temperature, it means that the heat storage material has stored enough heat. It can be selected whether to enter the heat release stage according to the actual situation.

[0043] Heat release process: Low-temperature water from the heat user enters the inlet chamber of the inlet / outlet chamber cover 1 through the inlet pipe 6, and then enters the heat exchange tube 17 through the tube hole of the tube sheet 12. The low-temperature water passes through the heat exchange tube 17, the connecting water chamber cover 2, the heat exchange tube 17 and the outlet chamber of the inlet / outlet chamber cover 1 in sequence, and finally is discharged to the heat user through the outlet pipe 7. During the heat release process, the low-temperature water completes the heat exchange process with the liquid phase change thermal storage material through the tube wall of the heat exchange tube 17. After absorbing heat and heating up, the low-temperature water is supplied to the heat user to provide heat. After the liquid phase change thermal storage material releases heat and cools down, it becomes solid. When the temperature of the end thermal storage material reaches the set lower limit temperature, it means that the thermal storage material has released all the stored heat. It can be selected whether to enter the thermal storage stage according to the actual situation.

[0044] In summary, this utility model provides a high-efficiency phase change thermal storage device. The heat exchange tubes are preferably small-diameter, thin-walled fluoroplastic tubes, and all areas in contact with the phase change thermal storage material are lined with fluoroplastic, fundamentally solving the corrosion problem of phase change thermal storage devices. The heat exchange tubes are U-shaped, small-diameter, thin-walled fluoroplastic tubes equipped with dedicated fluoroplastic pipe clamps. The inner liner, the inner liner's anti-corrosion layer, and the outer casing all adopt a U-shaped structure design that perfectly matches the shape of the U-shaped heat exchange tubes, fully utilizing the internal space of the thermal storage device and achieving a uniform arrangement of the heat exchange tubes and the phase change thermal storage material, which is conducive to the efficient operation of the heat storage and release process. The inner liner and the side inner liner sealing plate are connected by flanges, facilitating the installation and disassembly of the fluoroplastic tube heat exchange unit and providing convenience for later inspection and maintenance. A unique design structure for the thermal storage material filling and venting pipelines facilitates the filling of the phase change thermal storage material. The skid-mounted integrated structure design facilitates on-site construction and installation, and customized solutions can be adopted for multiple thermal storage devices connected in series or parallel according to the customer's actual heat usage.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-efficiency phase change thermal storage device, characterized in that, include: Encapsulation unit, inner liner unit, heat transfer medium unit, and heat storage material unit; The encapsulation unit includes a shell (3) and a heat insulation layer wrapped inside the shell (3); The inner liner unit includes an inner liner (15), an inner liner anti-corrosion layer (14) disposed inside the inner liner (15), an inner liner sealing plate (11) fixed to one side of the inner liner (15), an inner liner reinforcing rib (20) disposed on the outer wall of the inner liner (15), an inner liner connecting flange (21) connecting the inner liner (15) and the inner liner sealing plate (11), and a support (4) supporting the inner liner (15); The heat transfer unit includes an inlet and outlet water chamber cover (1), a connecting water chamber cover (2), an inlet pipe (6) and an outlet pipe (7) connected to the inlet and outlet water chamber cover (1), a tube sheet (12) connected to the inlet and outlet water chamber cover (1), the connecting water chamber cover (2) and the inner tank (15) by a flange, a tube sheet anti-corrosion layer (13) attached to the tube sheet (12), a U-shaped heat exchange tube (17) penetrating the tube sheet (12) and the tube sheet anti-corrosion layer (13), a pipe clamp (16) for fixing the U-shaped heat exchange tube (17), and a pipe clamp connector (19) for connecting the pipe clamp (16). The thermal storage material unit includes a filling pipe (8), an exhaust pipe (9), and a phase change thermal storage material filled in the space enclosed by the inner liner anti-corrosion layer (14) and the tube sheet anti-corrosion layer (13); The two ends of the U-shaped heat exchange tube (17) are respectively inserted into the tube sheet (12) and the tube sheet anti-corrosion layer (13), and are fixed to the tube sheet (12) by expansion or welding; the lower straight section of the U-shaped heat exchange tube (17) is arranged at regular intervals by multiple tube clamps (16) and connected and fixed by tube clamp connectors (19); the inner liner anti-corrosion layer (14) and the tube sheet anti-corrosion layer (13) are both fluoroplastic liners, and the U-shaped structure of the inner liner (15) matches the shape of the U-shaped heat exchange tube (17).

2. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, The filling pipe (8) and the exhaust pipe (9) pass through the tube sheet (12) and the tube sheet anti-corrosion layer (13) respectively, and are divided into two branches extending to the top two ends of the inner liner (15). Two filling holes and two exhaust holes are opened on the upper middle wall of the inner liner (15) and the inner liner anti-corrosion layer (14). The two branches of the filling pipe (8) are connected to the two filling holes respectively, and the two branches of the exhaust pipe (9) are connected to the two exhaust holes respectively. Each of the filling pipe (8) and the exhaust pipe (9) is provided with an isolation valve. The inner walls of the filling pipe (8) and the exhaust pipe (9) are lined with a fluoroplastic anti-corrosion layer.

3. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, The inner side of the inlet and outlet water chamber cover (1) is provided with a water chamber partition (18) to divide the water chamber into an inlet water chamber and an outlet water chamber; the inner walls of the inlet pipe (6) and the outlet pipe (7) are lined with a fluoroplastic anti-corrosion layer, and the lower outer wall and end face of the inlet pipe (6) and the outlet pipe (7) are provided with several water distribution holes.

4. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, The U-shaped heat exchange tube (17) is a small-diameter thin-walled fluoroplastic tube; the tube clamp (16) is made of fluoroplastic material, and the adjacent tube clamps (16) are fixedly connected by the tube clamp connector (19).

5. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, The inner liner sealing plate (11) is fixedly connected to the inner liner (15) and the tube sheet (12) through the inner liner connecting flange (21), and the inner wall of the inner liner sealing plate (11) is lined with a fluoroplastic anti-corrosion layer.

6. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, The upper part of the inlet / outlet water chamber cover (1) and the connecting water chamber cover (2) are respectively provided with lifting lugs (5); the outer shell (3) is made of color steel plate or galvanized iron sheet and is wrapped around the outside of the insulation layer.

7. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, The tube sheet (12) is connected to the inlet and outlet water chamber cover (1), the connecting water chamber cover (2) and the inner tank (15) through the water chamber cover connecting flange (10); the bottom of the inner tank (15) is supported and fixed by the support (4).

8. The high-efficiency phase change thermal storage device as described in claim 1, characterized in that, A material temperature gauge is installed in the phase change thermal storage material near the water outlet pipe (7) to monitor the temperature of the thermal storage material.

Images